Initial support to automatically add an asterix (*) to labels that are associated with model attributes that are required (via ActiveRecord::Validations::PresenceValidator)
Update the readme to reference the required asterix feature.
Fixed the code :-)
Update test cases to support required fields.
Handle nil models / attributes.
Update README with information about required labels
Last attempt at an explanation that makes sense
Add support for required labels when using ActiveModel
Don't assume eveybody loves *.  Only define the CSS class 'required' with the label and
leave the actual CSS definition up to the user.
Updated changelog with information about required label class
Merge remote-tracking branch 'upstream/master' into required_label_asterix

Conflicts:
	CHANGELOG.md
Merge pull request #150 from krsyoung/required_label_asterix

Required label asterix